Treat

Algerina Perna/Baltimore Sun

At the Maryland Zoo in Baltimore, Animal keeper, Katie Ernest works with Anna, a 37 year-old elephant. The trainers use bullhooks, body language, voice commands and treats (pictured) to direct the elephants.

At the Maryland Zoo in Baltimore, Animal keeper, Katie Ernest works with Anna, a 37 year-old elephant. The trainers use bullhooks, body language, voice commands and treats (pictured) to direct the elephants. (Algerina Perna/Baltimore Sun)

At the Maryland Zoo in Baltimore, Animal keeper, Katie Ernest works with Anna, a 37 year-old elephant. The trainers use bullhooks, body language, voice commands and treats (pictured) to direct the elephants.